Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a rodada mais alta, quando o oponente é Junior Pitbull?
 ###Tabelas: CREATE TABLE specs_and_range (specs_and_range_id AUTO_INCREMENT PRIMARY KEY, Model VARCHAR, Engine make/Capacity VARCHAR, Power kW@rpm VARCHAR, Torque Nm@rpm VARCHAR, GVM (kg) Technical Capacity VARCHAR, GCM (kg) Technical Capacity VARCHAR) CREATE TABLE mixed_martial_arts_record (mixed_martial_arts_record_id AUTO_INCREMENT PRIMARY KEY, Result VARCHAR, Record VARCHAR, Opponent VARCHAR, Method VARCHAR, Date VARCHAR, Round INT, Location VARCHAR, Notes VARCHAR) CREATE TABLE doubles_finals_36_18–18 (doubles_finals_36_18–18_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Location VARCHAR, Surface VARCHAR, Partnering VARCHAR, Opponent in final VARCHAR, Score VARCHAR) CREATE TABLE legislation_sponsored_by_john_mccain (legislation_sponsored_by_john_mccain_id AUTO_INCREMENT PRIMARY KEY, Years covered VARCHAR, All bills sponsored INT, All amendments sponsored INT, All bills cosponsored INT, All amendments cosponsored INT, Bills originally cosponsored INT, Amendments originally cosponsored INT) CREATE TABLE imported (imported_id AUTO_INCREMENT PRIMARY KEY, Model VARCHAR, Build year VARCHAR, Top speed (In operation) （km/h） INT, Power output （kW） VARCHAR, Total production INT)  
SELECT MAX Round FROM mixed_martial_arts_record WHERE Opponent = junior pitbull